Protective battery case



FIG. 1 is a top-front perspective view of a protective battery case;

FIG. 2 is a top-rear perspective view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a left-side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the drawings illustrate unclaimed features of the protective battery case that form no part of the claimed design. 

CLAIM The ornamental design for a protective battery case, as shown and described. 